(Mountain Barrens isn't a spell.)

At the beginning of your upkeep, Mountain Barrens deals 2 damage to target creature you control.

Discard two cards: Put a 2/2 black Zombie creature token onto the battlefield.

, Pay 1 life, Sacrifice Mountain Barrens: Search your library for a Swamp or Mountain card and put it onto the battlefield, then shuffle your library.